Pump



Dec. 6, 1927; Y 1,651,682

c:. P. EISENHAUER PUMP Filed Feb. 28. 1927 Fig.1.

'Jwmn CHARLES P- EISENHhl/ER,

Patented Dec. 6, 1927.

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CHARLES r. nrsnnnnnnn, or DAYTON, OHIO, ASSIGNORTO .THE" DURO 'oorrrAnY,

OF DAYTON, 01119, A CORPORATION OFOHIO.

PUMP.

Application filed February 28, 1927. Serial No; 171,517.

Myinvention relatesto valves for pumps. It is the ob ect of my 1nvent1on to provlde a valve which will have the maximum of 7 area for the escape of liquid, and will, at the same time, be noiseless so that a rapid reiprocation of pumping mechanism will not set up objectionable valve noise.

Referring to the drawings:

Figure 1 is a section through the cylinder inlet housing, piston and valve mechanism, as well as the inlet housing with the parts in position for ejection of the liquid;

Figure 2 is a view of the parts in balanced condition;

Figure 3 is a view of the parts in discharge condition.

Referring to the drawings in detail, 1 is a housing containing aninlet chamber '2 into which liquid is introduced through the inlet opening 3 The liquid makes its exit through the ports 4 into the cylinder sleeve or casing carried within the main casing 1. The piston rod 6 is provided having mounted thereon a piston 7 and a washer 8. This piston has connected to it and its rod by thescrewfi a spider having openings 11 through which the fluid in thecylinder is adapted to flow into the interior of'a cylinder 12 formed on the end of the spider .10. Thiscylinder constitutes asecond piston which also carries a washer 8 engaging with the side walls of the cylinder 5. Mountedon the second piston 12 is a ring 13 which carries one end of a helical spring 14:, the coils of whit-hare normally in engagement 'with one another. The end of the spring is sealed byv a plug 15 supported by the spring so that n'hen the spring is in position of rest the end of the cylinder 12 is sealed by the spring 1 1 and its cap 15 forming a fluid tight chamber. 7

This chamber formed of the spring 14 and its end 15 is adapted to telescope within a similar but larger chamber formed by a helical spring designated 16 having an end cap 17. This spring is supported by a ring 18 carried within a larger plate 19 between the casing 1 and the exit casing 20. This spring 16 also normally is so arranged thatits coils engage one another forming a closed cylinder.

The main cylinder and intake 'casing'and the exit casing respectively numbered 1 and 20 are held together by one or more bolts, such as 21, such bolts passing through the ring19, the junctures betweenthe ring and the two casings being sealed by the washers 22. j i i g 1 zlfethod 0f 0pemtz'0a.-When the piston and piston rodmoves to the right hand,

water is drawn in through the openings ll to the interior of the cylinder 12'Iand the interior of the spring 14. The pressureof compression of thiswater serves to move this spring laterally, separating its coils and permitting the water to escape between the cells. The vacuum 'createdin between the valves causes the spring 14: to open, allowing the water to enter the piston chamber.

This permits of a large numberof separate annular openings being provided and therefore a large area forthequick exitof the water.

ton and piston rod, these coils of the spring again close forming a solid closed cylindrical surface for the compression) of the water which is now Within. the outer spring 16 so that it in turn isexpan'ded and the water makes its exit-between the coils of the spring 16 into the 'eXit; chamber in the casing 20, thence out the exit opening, 28.

. This arrangement has a dual advantage.

In the first place,,-theoperation of the valve formed by the coils of the spring permits of a very rapid and noiseless valve mechanism; In the second place, the area is very large over theexit of the water because, instead of having'a single opening between a valve member and'its exit, there are many similar openings for this purposc as'tliere are coils of the spring which may be separated. The timing of the valve mech tions as may be necessary to adapt it to varying conditions and uses.

. Having thus fully described my invention what I claim as new and desire to secure b Letters Patent, is I p l. A new article of manufacture for use as a valve consisting of a helical spring having one end open for the introduction of Upon'tho return towards the left of the pis= fluid on the interior thereof and the other end closed, whereby upon a predetermined pressure being achieved on the fluid on the interior of the spring its coils will be sprear and the exit of the fluid will take place.

2. In combination, a cylinder,a piston and piston rod and a valve means carried by said piston adapted to receive water from the cylinder consisting of a helical spring having its coils normally closed, and a sealing member for the end of said spring, the otherendof thespring being open for receiving the fluid from the'cylinder.

3. In combination, a cylinder, a piston and piston rod and valvenzeans carried by said piston adapted to receive water from the cylinder consisting of a helical spring having its coils normally closed, and a sealing member for the end of said spring, the

other end of the spring being open for receiving the fluidfrom the cylinder, and a second larger spring similarly arranged adapted to receivev liquid "from the first mentioned spring and whereby the movement of the piston in onedirection will result in the opening of the first mentioned spring for the passage of fluid therethrough and the movement of the piston in the other direction will result in theopening ogt the second spring all) I within said for the exit of fluid therefrom.

41.. In combination, a cylinder, a piston and piston rod, said cylinder having an entrance opening in front of said piston, a second pistonspaced fromjthe piston,

- said secondpiston beinghollow'and having openings for the introduction of fluid from; the cylinder into the interior thereof, and yielding neans closing the end of said second pistonadapted to expand; and permit the eXit otiflui d under compression of the fluid lelding means. v, 5 Infcombination, a cylinder, a piston and piston. rod, said cylinder having an entrance opening in; front of said piston, a second piston, spaced from the firstpiston, said second piston being hollow and having openings for the introduction of fluid from the cylinder into the interior thereof, and yielding means closing the end of said second piston adaptedto expand and permit the exit or fluid under compression o1 the fluid within said ieldin means and a second ieldin means spaced pistons therein, a pair of spaced adapted to telescope to receive the first yielding means. having one end thereof sealed whereby the fluid compressed therein by the first yielding means may escape through the second yielding means;

6. In combination, a cylinder, a piston and a pair of telescopic-ally arranged helical springs having closed ends at one end and open ends at the other for receiving fluid, one of said springs being stationary and the other being movably connected to said piston. I

7. In combination, a cylinder casing having an inlet port arranged between a pair of pistons, a piston rod, one oi said pistons being hollow and adapted to receive liquid from the cylinder into the interior thereof, a helical spring having normally closed coils mounted in the end of saio hollow piston,

means to close'the end of said spring, a second helical spring having a normally closed coils of larger diameter than the first helical spring, stationarily mounted at the end of said cylinder adapted to telescopicaily receive the first mentioned spring, and an exit chamber surrounding said second spring.

8. In combination, a cylinder having a stationary wall with an inlet port and a yielding normally closed expansible wall, a pair of spaced pistons having a portion formed into a cylinderadaptedto communicate with the interior of tile main cylinder, said piston having awall of yielding expansible material adapted to permit the escape of liquid therein under pressin-e.

9. In combination, a cylinder, hollow piston adapted to receive liquid from the cylinder, said piston having an expansible wall for the exit of liquid therethrough,

when the liquid is compressed within said wall, a piston, and an expansible wall of GX-.

pansible yielding material forming a part of said cylinder adapted to permit the escape of liquid c'oi'npressed between said ieldin fl ex aansible wall and said hollow V y 2:: 7

piston.

In testimony whereof, I afi'ix my signature.

CHARLES P. EISENI-IAUER.

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